As a general rule of thumb, flushing your engine once a year is a good preventative maintenance measure. This is especially important on engines with flexible rubber impellers. Marine growth is the most common cause of impeller failure.

Monitoring your engines temperature is crucial. A consistent temperature increase of 5-10 degrees could mean a problem is starting to form within your cooling system. Flushing before the problem gets worse could save you a world of headaches.

On most engines, seawater discharged from the engine is used to cool the exhaust gases exiting the engine. If this water flow is reduced, steam (or white smoke) will begin to exit from the exhaust. One reason for this could be a clogged heat exchanger or after cooler. Flushing the engine may prove to be an inexpensive troubleshooting technique for a boat owner.

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